datagridview-link-column ソースコード全文

<Solution>
  <Project Path="DataGridView_LinkColumn/DataGridView_LinkColumn.csproj" />
</Solution>

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net10.0-windows</TargetFramework>
    <Nullable>enable</Nullable>
    <UseWindowsForms>true</UseWindowsForms>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

</Project>

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    <ItemGroup>
        <Compile Update="Form1.cs">
            <SubType>Form</SubType>
        </Compile>
    </ItemGroup>
</Project>

using System.ComponentModel;
using System.Diagnostics;

namespace DataGridView_LinkColumn
{
    public partial class Form1 : Form
    {
        private BindingList<SiteModel> _sites = new();

        public Form1()
        {
            InitializeComponent();
            InitializeDataGridView();
        }

        private void InitializeDataGridView()
        {
            // 1. サンプルデータの登録（表示したいURLをセット）
            _sites.Add(new SiteModel("Google", "https://www.google.com"));
            _sites.Add(new SiteModel("Microsoft", "https://www.microsoft.com/ja-jp"));
            _sites.Add(new SiteModel("watermargin.net", "https://watermargin.net"));

            // 2. 手動でリンク列を作成して追加する
            var linkCol = new DataGridViewLinkColumn();
            linkCol.DataPropertyName = nameof(SiteModel.Url); // モデルのUrlプロパティと連動
            linkCol.HeaderText = "参考URL";
            linkCol.Name = "UrlLink";                         // イベント内で特定するための列名

            // リンクの見た目（色のカスタマイズ：任意）
            linkCol.LinkColor = Color.Blue;
            linkCol.ActiveLinkColor = Color.Red;
            linkCol.VisitedLinkColor = Color.Purple;

            dataGridView1.Columns.Add(linkCol);

            // 3. その他の列を自動生成してデータソースを設定
            dataGridView1.DataSource = _sites;
            dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;

            // 4. リンクのクリックを検知するイベントを購読
            dataGridView1.CellContentClick += DataGridView1_CellContentClick;
        }

        /// <summary>
        /// セルの「中身（テキスト部分）」がクリックされたときに発生するイベント
        /// </summary>
        private void DataGridView1_CellContentClick(object? sender, DataGridViewCellEventArgs e)
        {
            // ヘッダー行や、存在しない行インデックスの場合はスキップ
            if (e.RowIndex < 0 || e.ColumnIndex < 0) return;

            // クリックされた列が、先ほど作成した「UrlLink」列であるかチェック
            if (dataGridView1.Columns[e.ColumnIndex].Name == "UrlLink")
            {
                // セルから URL 文字列を取得
                string url = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value?.ToString() ?? "";

                if (!string.IsNullOrEmpty(url))
                {
                    // 最新.NET環境に対応した安全なブラウザ起動ロジック
                    var startInfo = new ProcessStartInfo
                    {
                        FileName = url,
                        UseShellExecute = true // これを True にしないとエラーになります
                    };
                    Process.Start(startInfo);
                }
            }
        }
    }
}

namespace DataGridView_LinkColumn
{
    partial class Form1
    {
        /// <summary>
        ///  Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        ///  Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        ///  Required method for Designer support - do not modify
        ///  the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            dataGridView1 = new DataGridView();
            ((System.ComponentModel.ISupportInitialize)dataGridView1).BeginInit();
            SuspendLayout();
            //
            // dataGridView1
            //
            dataGridView1.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            dataGridView1.Dock = DockStyle.Fill;
            dataGridView1.Location = new Point(0, 0);
            dataGridView1.Name = "dataGridView1";
            dataGridView1.RowHeadersWidth = 62;
            dataGridView1.Size = new Size(800, 450);
            dataGridView1.TabIndex = 0;
            //
            // Form1
            //
            AutoScaleDimensions = new SizeF(10F, 25F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(800, 450);
            Controls.Add(dataGridView1);
            Name = "Form1";
            Text = "Form1";
            ((System.ComponentModel.ISupportInitialize)dataGridView1).EndInit();
            ResumeLayout(false);
        }

        #endregion

        private DataGridView dataGridView1;
    }
}

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        <value>[base64 mime encoded serialized .NET Framework object]</value>
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    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
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              <xsd:attribute ref="xml:space" />
            </xsd:complexType>
          </xsd:element>
          <xsd:element name="assembly">
            <xsd:complexType>
              <xsd:attribute name="alias" type="xsd:string" />
              <xsd:attribute name="name" type="xsd:string" />
            </xsd:complexType>
          </xsd:element>
          <xsd:element name="data">
            <xsd:complexType>
              <xsd:sequence>
                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
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namespace DataGridView_LinkColumn
{
    internal static class Program
    {
        /// <summary>
        ///  The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            // To customize application configuration such as set high DPI settings or default font,
            // see https://aka.ms/applicationconfiguration.
            ApplicationConfiguration.Initialize();
            Application.Run(new Form1());
        }
    }
}

namespace DataGridView_LinkColumn
{
    public class SiteModel
    {
        public string SiteName { get; set; }
        public string Url { get; set; } // リンク列のバインド先

        public SiteModel(string siteName, string url)
        {
            SiteName = siteName;
            Url = url;
        }
    }
}